// Form Validation

function isEmpty(strng, field) {
    var error = "";
    if (strng.length == 0) {
        error = "Please enter a value in the " + field + " field.\n"
    }
    return error;
}

function checkRetypeEmail (strng, strng2) {
    var error="";
    if (strng2.length == 0) {
        error = "Please enter your email address in the Retype Email field.\n"
    } else if ( strng != strng2 ) {
        error = "The e-mail addresses you entered do not match.\n"
    }
    return error;
}

function checkEmail (strng) {
    var error="";
    if (strng == "") {
        error = "You didn't enter an email address.\n";
    }

    var emailFilter=/^.+@.+\..{2,3}$/;
    if (!(emailFilter.test(strng))) { 
        error = "Please enter a valid email address.\n";
    }
    else {
        //test email for illegal characters
        var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
        if (strng.match(illegalChars)) {
            error = "The email address contains illegal characters.\n";
        }
    }
    return error;    
}